Unofficial guides :
[manual install on Linux]
[cpanel install on Linux]
http://www.youtube.com/watch?v=XV5RR46NCmU (not very recent)
Official guide (it's not Windows specific) :
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.